Chiral metallacyclophanes were self-assembled from cis-(PEt3)2PtCl2 and enantiopure atropisomeric 1,1'-bina-phthyl-6,6'-bis(acetylenes) and used in highly enantioselective catalytic diethylzinc additions to aldehydes to afford chiral secondary alcohols.
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Jiang et al. (2002) studied this question.
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